Azo compounds and material colored therewith



Patented Apr. 23, 1946 UNITED: STATES PATENTTOFFICET Azo COMPOUNDS AN THEREMTH D MATERIAL COLORED Joseph B. Dickey, Rochester, N. Y., assignor to. EastmanKodak Company, Rochester, N. Y., a'corporation of New Jersey No Drawing. Applic 8 Claims.

'Thisinvention relates to azo compounds and to fibrous organic derivatives of cellulose colored therewith. More particularly it relates to azo compounds having the general formula:

stituent including among'others a 'nitrogroup, a halogen, an acylaminogroup, 'a hydroxyl group, and an alkyl group.

It should be noted thatwhile the invention is primarily concerned with the monoazo compounds, polyazo compounds are likewise included within the scope of my invention. above formula, for example, may be an aromatic component containing an 2.20 bond such as an X azobenzene radical.

It is an object, therefore, of my invention to prepare the class of azo compounds above described and to color cellulose organic derivatives,

particularly cellulose acetate in the form of fibres, threads, yarns and fabric materials therewith.

The azo compounds of the invention may be prepared by coupling the diazo salts of various suitable arylamines with naphthoindole coupling compounds having the general formula:

wherein R2 and R3 have the meanings previously l ration. of the-azo compounds of my invention.

R in: the

ation August 11, 1939',-

Serial No. 289,693v

EXAMPLE 1 1 mole of p-nitroaniline is suspended in 2000 0. cs. of water with 400 0. es. of hydrochloric acid and diazotized at 5-15 C.,. with. 69 grams of 'sodium nitrite. 1 mole of G-hyd'roxy naphthoindole isdissolved indilute hydrochloric acid, ice added, .andthe diazo solutionsl'owly added... After standing for a short time, the mixture is made neutral to Congo red indicator with sodium ace tate, and when the coupling reaction is complete the dye is filtered, washed and dried. Cellulose acetate is colored blue shades from aqueous suspensions of the dye. I

The azo compound obtained has the formula:

XAMPLE 2 and coupled with 1 mole of l-c-hydroxyethyl-Q- hydroxy naphthoindole in the manner described in Example 1. Cellulose acetate is colored blue shades. from aqueous. suspensions of the dye.

' The azo compound obtained has the formula:

EXAMPLE 3 1 mole of ZA-dinitroaniline is dissolved in. 2200' droxy-naphthoindole dissolved in a mixture of' ice and dilute hydrochloric acid, after which the mixture is made neutral to- Congo red indicator with sodium acetate. When the coupling reaction is complete, the dyeis. filtered out, washed. and. dried. Cellulose acetate is colored greenish-blue shades from aqueous suspensions of the dye.

The aim compound obtained has the formula:

from the group consisting of hydrogen-,and analkyl group. The benzene nucleus, R1 may carry,

on the other carbon atoms any monovalent 1 mole of penitro-o-chloroaniline is diazotized EXAMPLE4 1 mole of 2,4-dinitro-6-chloroaniline is diazotized and copled with 1 mole of l-p-sodium phenyl phosphatoethyl-3-methyl-6,7-dihydroxy naphthoindole following the procedure described in' Example 3. Cellulose acetate is colored greenish-blue shades from aqueous suspensions of the ye.

The azo compound obtained has the formula:

0 ONa N02 HO The scope of my invention will be more fully apparent, by reference to the following table, wherein are shown various suitable diazotization and coupling components, the dyes resulting therefrom coloring cellulose acetate fibers the shades of-color designated.

dye compound to a paste with a dispersing agent such as soap, a sulfonated oil, or a higher fatty acid glyceryl sulfate, and then dispersing the resulting paste in water. The material to be colored is immersed in the dispersion starting with a bath temperature of 45-55" C. and then gradually increasing the temperature to -85 C., at which point it is maintained for several hours. The exhaustion of the dye bath may be facilitated by the addition of sodium chloride during the dyeing operation. When the material has been dyed to the desired degree, it is removed from the bath, washed with soap, rinsed and dried. Where the azo compound of my invention is water-soluble the dye may be applied directly from an aqueous solution withoutv the necessity of employing a dispersing or solubilizing agent. For a more detailed description as to how the water-soluble azo dyes of my invention may be employed for coloring fibrous materials, reference may be had to McNally & Dickey U. S. Patent No. 2,107,898, issued February 8, 1938.

Typical organic derivatives of cellulose include the hydrolyzed as well as the unhydrolyzed cellu- Table Shade of Diazo component Coupling component fig g acetate o-Nitroaniline (1 G-hydroxy mnhfhniminle Violet.

(2 fi-acetamino-l, S-dimethyl naphthoindole Do. (3 G-propionylamino-l, 3-dimethy1naphthoindole. Do. (4 fi-hydroxy-l-ethyl naphthoindole Do. (5) 6-nitro-8-hydroxy-3-propylnaphthoindole Do. (6) 9-hydr0xy-1-B-hydroxyethyl-3-methyl naphthoindole..- Do. (7) (true;layl-fi-hydroxy-Q-methyl-1-B-hydroxyethyl naphtho- Do.

in o e (8) 4451c};hyl-6-hydroxy-aethyl-l-dhydroxycthyl naphthoin- Blue.

0 o (9) 6-hydroxy-B-methyl-l-hydroxy-propyl naphthoindole..-. Do. (10) 6-hydroXy-1-glyceryl-3-methylnaphthomdole Do. (11) 6-l 1ydr]0xy-7-, 9-dichloro-l-methoxyethyl-ii-ethyl naphtho- Do.

in o e (12) fi-hygrloxy-Z 9-dibromo-1-methoxyethyl-3-ethyl naphtho- Do.

in o e (13) 6-hydroxy-1-sulfatoethyl-3-methyl naphthoindole Do. (14) 6-hydioxy-l-sulfoethyl-El-methylnaphthoindole Do. (15) G-hydroxy-l-phosphatoethyl-3-methyl napthoindole Do.

16) Naphthoindnln Red. 17) 3-methyl nanhfhnindn'ln Do. 18) G-propionylamino-l, 3-dimethyl naphthoindole Do. (19 1-fl-hydroxyethyl-3-methyl naphth0indolc Do. (20 l-y-hydroxypropyll-ethyl naphthoindolc Do. (21) l-glyceryl-e-methyl naphthomdole D0. 22) 1-sulfatoethyl-4-methyl naphthoind Do. 523) 1-sulloethyl-4-methylnaphthoindole Do. 24) l-B-hydroxy-fi-ethoxyethyli-methyl naphthoindole Do. (25; l-benzyl nanhfhninrinle (26 1-tetrahydrofurfuryl-3-methyl naphthoindole Do. (27; l-phenyls'i-methyl naphthoindole Do. (28 ll-cycllohgxyl-3-methyl naphthoindole B1 Do.

oup ers 1 ue. p'Nmoanflme {gouplers 16-28.-- gubinegl p-Nitro-o-chloroaniline gggfig 1552i g: p-Nitro-o-bromo-aniline {88353: fig -i iff' p-Nitro-o-fiuoroanillne- 88335;: 133 gg' p-Nitrophenyl-o-sulionic acid. 83 ;525:1325: g gg Couplers 1*15" Blue-green. 4'dmltroanume {Couplers 16-28 Violet. 2, 4-dinitro-6-chloroaniline.---- {883 553 513 Egg?- 2, 4-dinitro-6-bromoani1ino {833%}3: 353g 2, 4-dinitro-6-fluoroani1ine. {gggggg ff-.

. Couplers 115 Green.

G'tnmtmamhne {gouplers 16-28 Blue-green. p-Nitro-o-hydroxyaniline 33E122 123g gag; 6-nitro-2-aminobenzothiozole.; 11813 p-Aminoazobenzene l-B-sodium sulfatoethyl3-1nethyl-6-hydroxy naphthoindolo- Blue.

Since many of the azo compounds of my invention are water-insoluble, they are ordinarily applied to organic derivatives of cellulose, particularly fibrous cellulose acetate, in the form of an aqueous suspension obtainable by grinding the lose organic acid esters such as cellulose acetate, cellulose formate, cellulose propionate, or cellulose butyrate, and the hydrolyzed as well as the unhydrolyzedmixed organic acidl'este'rs suchfas cellulose acetate-propionate, cellulose acetate butyrate, and the cellulose etherssuch as methyl cellulose, ethyl cellulose, or benzyl cellulose While my invention is illustrated more particularlyin connection with the coloration of cellulose acetate, a material to which the invention is especially adapted, it will be understood that it applies to the coloration of other organic derivatives of cellulose such as those just mentioned.

- I claim:

1. The azo compounds having the general forwherein R represents a benzene nucleus, R1 represents a benzene nucleus joinedthrough adjacent carbon atoms to the carbon atoms numbered and 5, R2 represents a member selected from the group consisting of hydrogen, an alkyl group, a hydroxyalkyl group, an alkoiqralkyl group, a sulfoalkyl group, a sulfatoalkyl group, a phosphatoalkyl group, a cyclohexyl group, a tetrahydrofurfuryl group, an aralkyl group, and a phenyl group, and R3 represents a member select ed from the group consisting of hydrogen, and an alkyl group.

2. The azo compounds having the general for- 3 N-Rz wherein R represents a benzene nucleus, R1 represents a benzene nucleus joined through adjacent carbon atoms to the carbon atoms numbered 5 and 5, and R2 represents a member selected from the group consisting of hydrogen, an alkyl group,

a hydroxyalkyl group, an alkoxyalkyl group, av

sulfoalkyl group, a sulfatoalkyl group, a phosphatoalkyl group, a cyclohexyl group, a tetrahydrofurfuryl group, an aralkyl group, and a phenyl group. i

3. The azo compounds having the general formula:

wherein R represents a benzene nucleus, R1 repre sents a benzene nucleus joined through adjacent carbon atoms to the carbon atoms numbered 5 and 5, and R2 represents a member selected from the group consisting of hydrogen, an alkyl group, a hydroxyalkyl group, an alkoxyalkyl group, a sulfoalkyl group, a sulfatoalkyl group, a phosphatoalkyl group, a cyclohexyl group, a tetrahydrofurfuryl group, an aralkyl group, and a phenyl group.

4. The azo compounds having the general formula:

wherein R represents a benzene nucleus, R2 represents a member selected from the group consisting of hydrogen, an alkylgroup; a hydroxyalkyl group, an alko-xyalkyl group,*a' sulfoalkyl group, a sulfatoalkyl group, a phosphatoalkyl group, a cyclohexyl group, a tetrahydrofurfuryl group, an aralkyl group, and a phenyl group, and R3 represents a member selected from the group consisting of hydrogen, and an alkyl group.

5. The azo compounds having the general formula:

wherein R represents a benzene nucleus, R2 represents a member selected from the group consisting of hydrogen, an alkyl group, a hydroxyalkyl group, an alkoxy-alkyl group, a, sulfoalkyl group, a sulfatoalkyl group, a phosphatoalkyl group, a cyclohexyl group, a tetrahydrofurfuryl group, an

aralkyl group, and a phenyl group, R3 represents a member selected from the group consisting of hydrogen, and an alkyl group, andeach X represents a member selected from the group consisting of hydrogen, a hydroxyl group, a halogen, an acylamino group, and an alkyl group.

6. Material made of or containing an organic derivative of cellulose colored with a dye selected from the class of azo compounds having the general formula:

wherein R represents a benzene nucleus, R1 represents a benzene nucleus joined through adjacent carbon atoms to the carbon atoms numbered 5 and 5, R2 represents a member selected from the group consisting of hydrogen, an alkyl group, a hydroxyalkyl group, an alkoxyalkyl group, a sulfoalkyl group, a sulfatoalkyl group, a phosphatoalkyl group, a cyclohexyl group, a tetrahydrofurfuryl group, an aralkyl group, and a phenyl group, and R3 represents a member selected from the group consisting. of hydrogen, and an alkyl group.

7. Material made of orcontaining cellulose acetate colored with a dye selected from the class of azo compounds having'the general formula:

91 Eon R-N: 5' -N-R,

tate colored with a. dye selectedfrom the class of azo compounds having the general formula:

wherein R represents a benzene nucleus, R2 represents a. member selected from the group consist- JOSEPH B. DICKEY. 

